//Дефиницията е една и съща в всички варианти
// на Delphi и се намира в ShellAPI
//Просто си пишеш собствена дефиниция на функцията



unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ImgList, ExtCtrls, StdCtrls,shellapi;

type
TForm1 = class(TForm)
Button1: TButton;
Label1: TLabel;
TxtPathToFile: TEdit;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public

{ Public declarations }
end;

var
Form1: TForm1;

implementation

type ThIconArray = array[0..0] of hIcon;
type PhIconArray = ^ThIconArray;

function ExtractIconEx_Main(lpszFile: PChar; nIconIndex: Integer;
phiconLarge: PhIconArray;phiconSmall:PhIconArray;nIcons: UINT): integer; stdcall;
external 'shell32.dll' name 'ExtractIconExA';
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);

var
NumIcons : integer;
pTheLargeIcons : phIconArray;
pTheSmallIcons : phIconArray;
LargeIconWidth : integer;
SmallIconWidth : integer;
SmallIconHeight : integer;
i : integer;
TheIcon : TIcon;
TheBitmap : TBitmap;
begin


NumIcons :=
ExtractIconEx_Main(PChar(TxtPathToFile.Text) ,
-1,
nil,
nil,
0);
if NumIcons > 0 then
begin
LargeIconWidth := GetSystemMetrics(SM_CXICON);
SmallIconWidth := GetSystemMetrics(SM_CXSMICON);
SmallIconHeight := GetSystemMetrics(SM_CYSMICON);
GetMem(pTheLargeIcons, NumIcons * sizeof(hIcon));
GetMem(pTheSmallIcons, NumIcons * sizeof(hIcon));
FillChar(pTheLargeIcons^, NumIcons * sizeof(hIcon), #0);
FillChar(pTheSmallIcons^, NumIcons * sizeof(hIcon), #0);

ExtractIconEx_Main(PChar(TxtPathToFile.Text),
0,
pTheLargeIcons,
pTheSmallIcons,
numIcons);

for i := 0 to (NumIcons - 1) do
begin
DrawIcon(Form1.Canvas.Handle,
i * LargeIconWidth,
0,
pTheLargeIcons^);
TheIcon := TIcon. Create;
TheBitmap := TBitmap.Create;
TheIcon.Handle := pTheSmallIcons^;
TheBitmap.Width := TheIcon.Width;
TheBitmap.Height := TheIcon.Height;
TheBitmap.Canvas.Draw(0, 0, TheIcon);
TheIcon.Free;
Form1.Canvas.StretchDraw(Rect(i * SmallIconWidth,
100,
(i + 1) * SmallIconWidth,
100 + SmallIconHeight),
TheBitmap);
TheBitmap.Free;
end;

FreeMem(pTheLargeIcons, NumIcons * sizeof(hIcon));
FreeMem(pTheSmallIcons, NumIcons * sizeof(hIcon));
end;



end;

end.